Sewing-machine



(No Model.) I I 4 Sheets-Sheet 1. J. T. HOGAN.

SEWING MAGHINE. No. 570,478. Patented Nov. 3, 1896.

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(N0 Mqdel.)

J T HOGAN SEWING MACHINE. I

Patented Nov. 3, 1896.

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(No Model.)

J.T. HOGAN. SEWING MACHINE.

Patented Nov. 3, 1896.

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(No Model.) 4 Sheets-Sheet 4. J. T..HOGAN.

SEWING MACHINE. No. 570,478] Patented Nov. 3, 1896.

FFICE.

JAMES T. HOGAN, 013 JERSEY CITY, NEIV JERSEY, ASSIGNOR TO THE NATIONALMACHINE COMPANY, OF NEIV YORK.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 570,478, dated November3, 1896. Application filed February 17, 1894. $erial No. 500,543. (Nomodel.)

To all 1071 0112 it may (JO/LC'T/L.

Be it known that I, JAMES T. IIOGAN, of the city of Jersey City, countyof Hudson, and State of New Jersey, have invented a certain new anduseful Improvement in Sewing-Machines, of which the following is aspecification.

This improvement relates particularly to sewing-machines which areemployed for doing work of the kind commonly known as bar-tacking, whichconsists in first m aking a number of long stitches and afterward making a number of short stitches across the same. Such work is sometimesdone for the purpose of staying, strengthening, or finishing the end ofa buttonhole or across the end of a seam, as, for instance, at the mouthof a pocket.

I will describe a machine embodying my improvement and then point outthe novel features in the claims.

In the accompanyin g drawings, Figure 1 is a plan or top view of asewing-machine attachment embodying my improvement, certain parts beingshown in horizontal section. Fig. 2 is a vertical section of the sametaken at the plane of the dotted line 00 a, Fig. 1. Fig. 3 is a verticalsection taken at the plane of the dotted line U 3 Fig. 1. Fig. 4 is arear elevation of a sewing-machine provided with the improvement. Fig. 5is-a transverse vertical section of such a sewing-machine. Fig. 6 is anend elevation of the sewing-machine, illustrating a construction ofpresser-foot. Fig. 7 is a horizontal section at the plane of the dottedline .2 2, Fig. 4. Fig. 8 is a detailed view illustrating an adjustablecam. Fig. 9 is a plan or top view similar to Fig. 1, illustrating amodification. Fig. 10 is a plan of a piece of fabric tacked by means ofthe machine shown.

. Similar letters of reference designate corresponding parts in all thefigures.

A designates the sewing-machine head. It

may be of any approved construction. As here shown, it is provided withabase-piece a.

The stitching mechanism may be of any suitable type. In the presentinstance it comprises a needle-bar B, which reciprocates vertically inbearings o (1 and derives its mobe seen by reference to Fig. 6.

tion, through a pitman or rod Z), from acrank B, carried by a shaft C,said crank being here represented as made in the form of a wrist-pinprojecting from a disk aflixcd to I the shaft.

In this improvement I employ a special presser-foot mechanism, which Iwill now describe.

D designates the presser-foot. of any suitable construction. As hereshown, it is of ordinary form. It has a shank (Z, con sisting of aresilient strip of metal, and this shank is attached to the lower end ofa presserfoot bar I), which is capable not only of a verticalreciprocating motion, but also of vibratingtransversely in twodirections, which are at right angles to each other.

The upper portion of the presser-foot bar I) is supported by a bearing(6, which is It may be spherical at the upper part, so as to fit in a.

concave recess forming a bearing (0, wherein the bearing a is supported.A spring (If is coiled around the presser-foot bar, between the underside of the bearing a and a collar diwhich is supported adjustably inposition upon the presser-foot bar by means of a screw or otherwise. Thelower side of the bearing (1, will preferably be flat, so as to form asuitable seat for the upper end of the spring. The spring holds thebearing a in the hearing a and the latter supports the upper portion ofthe presser-foot bar, allowing it to reciprocate vertically and vibrateor swing in any direction. The upper extremity of the presser-f0ot barpasses through a hole a which is made upwardly flaring, so as to allowof the vibrating movement of the presser foot bar.

The lower portion of the presser-foot bar has a flat surface (1*, andthat portion on which this flat surface is formed reciprocates through alug a. In the front side of this lug is a horizontal recess or notch,which may \Vithin this recess fits a block or gib d. In this lug is avertical opening of such'size and shape as to permit of the presser-footbar vibrating or swinging in any direction. The block d bears againstthe flat surface (1 of the presserfoot bar, it being held in. contacttherewith lever projects under the collar (Z by means of a springcZ*",\vl1icli is fastened to the front of the lug a and extends into itsrecess and against the block (1".

The block or gib d", being flat at the back, coacts with the flatsurface (Z of the presserfoot bar in such manner as to prevent anyrotating of the latter. Owing to this, it does not interfere with thevibration or swinging of the presser-foot bar in a plane toward and fromthe needlebar. As the spring (Z allows for a movement of the block (1within the recess of the lug a, provision is afforded for a swinging; orvibrating motion of the presserfoot bar in the direction of the lengthof the sewing-machine head.

The vibrating movements of the presserfoot, and consequently of thepresser-foot bar, are derived from the cloth-clamp.

Any suitable means may be employed for raising and lowering thepresser-foot. In the present instance I have shown a lever D f ulcrumedby a screw (1" to a lug extending from the sewing-machine head. One endof this The other end may be provided with any suitable means forfacilitating its manipulation. hen this leveris oscillated in onedirection, the presserfoot bar will be raised, and when the lever isreleased the spring (1 will lower the presserfoot to its operativeposition.

E designates a cloth-plate, upon which the material to be tacked islaid. It may be of any suitable construction. In the present instance itis of rectangular form and has a number of corrugations or serrations eto obviate the slipping of the fabric. It will of course be understoodthat the fabric is to be held upon the cloth-plate by the presser-foot.

The cloth-plate E is shown as having a shank c, which extends over aplate P. Upon this plate is mounted much of the mechanism employed in myimprovement, this feature of construction being adopted so that themechanism may be used in the form of an attachment. A bar P holds theshank of the clothplate in contact with the plate P.

r The shank of the cloth-plate is attached to the under side of a feedslide-block F, which is here represented as made rectangular in form andas fitted into a slot 9, formed in a vibrating plate G, the slot beingpreferably longer than the feed slide-block, so to allow of theindependent movement of the latter.

The movement of the feed slide-block within the slot g of the vibratingplate is for the purpose of feeding a fabric in the direction of thelength of a bar or tack, by which I mean a piece of work such as isillustrated in Fig. 10.

Motion is imparted to the feed slide-block F lengthwise of the slot g inthe vibrating plate G by means of a crank F, which is here shown asfastened to a feed-disk F so as to be adjustable radially for thepurpose of varying the length of movement transmitted to the feedslide-block. The feed-disk F is here shown as made in the form of agear-wheel meshing with a gear-wheel F of half the size.

To the crank F is pivotally connected one end of a rod or pitman F",that engages with the feed slide-block F, engagement being made in thepresent instance by means of an L-shaped slot f in the rod or pitman Fand a screw-stud-f, inserted in the feed slide-block. The slot f is hereshown as formed in a separate piece, which is adjustably connected tothe main part of the rod or pitman F by means of a slidef and a screw fthis feature of construction being adopted to afford an adjustment tosuit bars or tacks of different lengths.

Normally that portion of the -Lshaped slot f which is transverse to thelength of the rod or pitman F is in engagement with the stud f, thisengagement being maintained by means of a spring f", which at one end isconnected to the outer end of the rod or pitman F and at the other endto an appurtenance g of the vibrating plate G.

The feed-disk F is provided with a shaft fflwhich may be formed integralwith it. This shaft f is supported in a bearing p,formed on thebase-plate P. On the lower end of the shaft f a washer f is arranged,said washer being of larger diameter than the shaft, and hence being ofa size to overlap the base-plate P adjacent to the bearing 17. A screw fpasses up through this washer and engages with a tapped hole in thebottom of the shaft f thus holding the shaft in place. The gearwheel Fis provided with a shaft f which may be made integral with it, and isshown as extending upwardly into a bearing formed in a bracket FZwhichis fastened to the baseplate P. A screw f, having a head large enough tolap over the top of the bracket F engages with the upper end of theshaft f thereby holding the gear-wheel F in position. Preferably,awasher,of leather or like material,will be interposed between the headof the screw f and the top of the bracket F for the purpose of producingfriction sufficient to obviate any accidental movement of the gear-wheelF On the under side of the gear-wheel F is a radial slot or opening f Ashere shown, this slot is formed in a separate block or piece of metal,which is secured to the under side of the gear-wheel by means of screwsor otherwise. lVith this radial slot f engages a pin or stud h, which iscarried by a gear-wheel II, it being in the present instance fitted to adisk h,that is secured by screws or otherwise to the top of thegearwheel II.

The gear-wheel II is mounted upon a stud 7L2, which is shown as made inthe form of a screw engaging with the base-plate P, and having anenlarged head for the purpose of holding the gear-wheel in place. Thegearwheel II is shown as having a cylindric hub that extends down into arecess formed in the upper side of the base-plate P, but it does nothave a bearing in this recess, but, on the ment with the periphery ofthe feed-wheel by.

is secured in said. recess.

contrary, has a bearing in the plateP which The use of this plate is notimportant except as it affords facility of manufacture and in fittingparts. It will, of course, be understood that the gearwheel II is soarranged relatively to the gearwheel F that the axes of the two wheelswill be out of line. This is illustrated in Fig. 3.

The gear-wheel H engages with a ratchet gear-wheel II. It may beremarked that the gear-wheel II is of the same size as the feed disk Fand that the gear-wheels F" and II are of the same size.

The gearwheel II is fitted to a stud 7L3, affixed to the base-plate P inany suitable manner, as, for instance, by being riveted thereto. I haveshown the gear-wheel II as having a tubular hub 7%, which fits the stud72, and extends down into a recess formed in the base-plate P.

I designates a feed-wheel, which is here shown as provided on itsperiphery with ratchet-teeth. It is fastened to the upper side of thegear-wheel II. a

I designates a pawl, pivoted by a pin or screw 2' to a pawl-lever I andheld in en gagemeans of a spring t. The pawl-lever I has a bearing uponthe tubular hub of the gearwheel H, so as to be free to oscillate aboutthe same. hen the pawl-lever is moved in one direction, the pawl willimparta corresponding movement to the feed-wheel; but when thepawl-lever is moved in the reverse direction its pawl will merely playover the teeth of the feed-wheel, the latter being prevented frommovement at this time by means of a stop-pawl 1 which is pivoted to apin or stud t fastened in the base-plate P and held in engagement withthe teeth of the feedwheel by means of a spring 2?.

Motion is imparted to the pawl-lever I by means of a feed-bar I, that ishere shown as .fitted to slide in a recess formed in the top of returnmovement is shown as being caused by a spring 2', fastened at one end tothe pawllever I and at the other end to the base-plate P or anappurtenanee thereof. tive motion of the feed-bar is produced by meansof a cam-bar I operating upon a toe or end piece 2', with which thefeed-bar is provided. The cam-bar I consists of a bar having acam-shaped surface opposite the end of the feed-bar I and mountedloosely at one end upon a shaft 1, and fastened at the other end to anarm *5, which is rigidly affixed to the shaft 1, the fastening devicehere shown, consisting of a clamping-screw i extending through atransverse slot in. the bar I and engaging with a tapped hole in the arm77. The shaft I has also affixed to it' an arm which, in conjunctionwith the arm 2"", may be considered as in effect forming a bell-crank orelbow lever.

Motion may be obtained for rocking the The opera as to be capable ofrotating around the same.

In the present instance it is held in place by means of a screw engagingwith the upper end of the stud h and having an enlarged head. This plateI is intended to suppress the action of the pawl 1 upon the feed-wheel Ifor certain periods. It is therefore made on a larger radius than thefeed-wheel I. It has ratchet-teeth upon its periphery, and preferablythese will be made upon'a rimjshaped piece which extends across theperiphery of the feed-wheel, although this is not essential if the pawlbe made wide enough to extend across both the edge of the plate I andthe feed-wheel.

As the feed-wheel I is rotated by the pawl I, it will carry the plate Iinto engagement with said pawl, and thereafter the pawl will for a timemerely rotate the plate 1 The stop-pawl I will also coact with the plateI Thus a dwell of the feed-wheel I will be produced. After the pawl Ishall have moved theplate I as far as possible the pawl I will moveintoengagement with the feed-wheel I again and impart motion thereto. It isintended that the plate 1 by its friction or otherwise, shall now remainat rest until a pin 2' which is carried by the'feed-wheel, impingesagainst a shoulder 1' of the plate I. After this happens the feed-wheelI will carry the plate I along with it until the latter again comes intoengagement with the pawl. The dwell produced by the plate 1 providesfor'the making of the long stitches and suspends the operation of makingthe crossstitches in producing a bar or tack.

Having now described the movement which produces the regularprogressivefeed necessary for the short crossstitches, I will explain amechanism whereby a quick movement in the same general direction, or, inother words, longitudinally of a bar or tack, may be produced for themaking of the long stitches.

J designates a cam carried by the plate 1 It coacts with a lever-arm Jaffixed to arockshaft J the latter being journaled in a bracket Jaffixed to the base-plate P. Preferably the lever-arm J will be providedwith a screw j, which by resting upon the base plate P will support saidlever in its raised position, and thereby relieve from wear that surfaceof the lever-arm which coacts with the cam J.

J is a lever fulcrumed by a pin j in the block or bracket g,previouslymentioned as a pointof connection for the spring a this blockbeing an appurtenance of the vibrating plate. \Vhenevcr the cam J raisesthe lever-arm J, it will raise one arm of the lever J and of coursedepress the other. The latter has a cam-surfacej which engages with aninclined surface with which the adjacent side of the rod or pitman F isprovided. Hence, when the lever J' is operated, it will move the rod orpitman transversely against the,resistance of the spring f and thus itwill disengage from the pin or stud f of the feed slide-block F thetransverse portion of the L-shaped slot f with which the rod or pitman Fis provided. This has the effect of disconnecting the feed slide-block Ffrom the rod or pitman F and leaving the feed slide-block free to beoperated by other means.

The cam J may be removed and another one of a different size substitutedfor it, or it may be so constructed as to be longitudinally adjustable.

K designates a rod or pitman, connected at one end by a pin or screw itwith the feed slide-block, and at the other end by means of aclamping-screw 7a of the lever-arm K. This lever-arm is arc-shaped andlongitudinally slotted to provide for connecting the clamping-screw 70at different points in the length of the arm. The lever-arm K is affixedto an upright shaft K which has a lever-arm K aflixed to its other end.In the upper surface of this lever-arm K is a longitudinal slot 70 forthe reception of a pin or stud Z,with which a rod L is provided. Thisrod L is provided near one end with a longitudinal slot Z, and throughthis passes a supporting pin or screw Z which extends into thesewing-machine head. By this means of supporting the rod L provision isafforded not only for a longitudinal movement, but also for a swingingmovement. The longitudinal movement may be limited by means of a pin orscrew '1 extending through the end of the rod into the slot Z. At theother end of the rod there is a hub or transverse notch P, for engagingwith a pin or screw Z carried by a lever M, which is vibrated lengthwiseof the sewing-machine head by means of a cam C, affixed to the shaft 0.lVhen the rod L is engaged with the pin or screw Z of the lever M, it isobvious that the motion imparted to the lever M will produce alongitudinal movement of the rod L. As

. the pin or stud Z of the rod L is engaged with the lever-arm Kwhenever the hub or notch Z of said rod L is engaged with the lever M,it must be obvious that the motion of the cam C is periodicallytransmitted to the lever-arm K and hence, through the shaft K lever-armK, and pitman or rod K,to the feed slide-block. This of course will beat a time when the feed slide-block is disconnected from the rod orpitman F and will be a quick movement sufliciently long for the longstitches used in making a bar or tack.

The engagement of the rod L with the pin or screw Z of the lever H iscontrolled by a lever M, which is affixed to the rock-shaft J It swingstoward and from the side of the sewing-machine head, and it assumes itsposition adjacent to the side of the sewing-machine head while the rod Lis in its forward position, or, in other words, in its movement towardthe needle-bar. It has an inclined surface m, and the rod L has acorresponding inclined surface Z Hence, when the leverarm M is movedinto a position adjacent to the side of the sewing-machine head and therod L moved back to its normal position, the

inclined surface Z of the rod L will ride up the inclined surface m ofthe lever-arm M, and this will effect the disengagement of the hub ornotch of the rod L from the pin or screw Z of the lever M.

The downward or engaging movement of the rod L is produced by a spring2', and the movement of the lever-arm M toward the sewing-machine headis produced by means of a spring m Obviously, whenever the rod L ismoved upwardly to disengage it from the pin or screw Z it is alsodisengaged from the lever-arm K. The latter will then be moved into itsnormal position by means of a spring K but as the rod L ought to returnthe lever-arm K to its normal position before disengagement, theemployment of the spring K is a mere matter of precaution. lVhen thespring is used, it will of course move the lever-arm K far enough tobring the pin or screw f of the feed slide-block to that end of the slotf of the rod or pitman F which is the nearer to the crank f, and thisend of this slot f will form a stop limiting the action of the spring K.

It will of course be understood that after the rod L is disengaged fromthe lever-arm K the latter will be left free to move with the feedslide-block, it having then, of course, no function.

Having described the two mechanisms for producing the movementslengthwise of a bar or tack, I will now briefly describe the means forproducing the vibratory motion necessary for the cross-stitches,promising that these means may be of any ordinary form.

The vibrating plate G has a shank g which is connected with the lowerend of the lever M. This lever is fulcrumed between its ends upon ascrew m which is capable of adjustment lengthwise of a vertical slotformed in a stationary bracket M to vary the length of thecross-stitches, or, in other words, to vary their width of bight.

The modification illustrated by Fig. 9 differs from the first example ofmy improvement with reference to the means for effecting the engagement"and disengagement of the rod or pitm an F and the feed slide-block F.It will be seen that the Lshaped slot f of the rod or pitman F has thetransverse portion extended reversely in Fig. 9 to the direction in Fig.1.

In Fig. 9 the rod or pitman F is provided with a vertically-extendingpin f and this is here shown as aflixed to the adjustable end piece inwhich the slot f is formed. This pin f engages with a slot mextendingparallel with the length of the feed slide-block F and formed in aslide-piece N. The slidepiece N is shown as made T-shaped, and its shankis fitted in a bearin g-block N, mounted .on the vibrating plate.

N is a lever fulcrumed between its ends upon a pin or screw at andfastened at one end by a pin or screw n to the shank .of the slide-pieceN. A spring N is fastened to this end of said lever and also to thebearingblock N. Hence, this spring serves to move the slide-piece N insuch direction as to effeet an engagement between the tranverse portionof the slot f in the rod or pitman 13" and the pin or screw f and tomaintain such engagement. The other end of the lever N coacts with anupright pin I carried by the feed-wheel, and this pin vibrates the leverat such time as to move the transverse portion of the slot f in the rodor pitman F out of engagement with the pin or screw f, so as to allowthe feed slide-block to be operated through the agency of the rod orpitman K.

I claim- 1. In a sewing-machine, the combination of a plate for thefabric to be sewed, mechanism for imparting to the plate a zigzagto-and-fro 1n ovement and a longitudinal ly-reciprocating movement, apresser-foot for holding the fabric upon said plate, a presscr-foot bar,and supports for the bar comprising a ball and ball-bearing at the upperportion of the bar through which the latter is movable longitu dinally,and a spring-pressed block at the lowerportion of the bar along whichthe bar may slide, said block being movable transversely to its lengthto admit of the corresponding movement of the bar, substantially asspecified.

2. In a sewing-machine the combination of a plate for the fabric to besewed, a support for the plate carrying it in the direction of thelength of a row of stitches to be made, a crank for imparting to saidsupport the necessary feeding movementin making a row of stitches, aconnectin g-rod connecting said support with said crank, mechanism forindependently imparting to said support a longitudinal reciprocatingmovement in the direction of the feeding movement, and means fordisconnecting said connectin g-rod from said support and rendering theaforesaid mechanism operative, and for connecting said connecting-rodwith said support and rendering said mechanism inoperative,substantially as specified.

3. In a sewing-machine, the combination of a plate for the fabric to besewed, a support for the said plate carrying it in the direction of thelength of a row of stitches which are to be made, a crank andconnecting-rod the lat ter having an L-shaped slot for engaging anddisengaging the said connecting-rod with and from a stud for impartingto said support the necessary movement for the feed in making said rowof stitches, a mechanism for impart ing to said support independently ofsaid crank and connecting-rod a long movement necessary for making along stitch lengthwise of the said row of stitches, and means forengaging the said connecting-rod with the said support andsimultaneously rendering the said mechanism inoperative and for disengaging the said connecting-rod from the said support and rendering the saidmechanism operative, substantially as specified.

4. In a sewing-machine, the combination of a plate for the fabric to besewed, a support for the said plate carrying it in the direction of thelength of a row of stitches to be made, a crank for imparting to saidsupport the necessary feeding movement in making a row of stitches, aconnecting-rod connecting said support with said crank, mechanism forindependently imparting to said support a longitudinal reciprocatingmovement in the direction of the feeding movement, a lever fordisconnecting the connecting-rod from said support, and a cam fortilting the lever, substantially as specified.

5. In a sewing-machine, the combination of a plate for the fabric to besewed, a support for the said plate carrying it in the direction of thelength of a row of stitches which are to be made, mechanism forimparting to said support the necessary movement for the feed in makingsaid row of stitches, a connectingrod connected with said support, alever K, K K with which said connecting-rod is con% nected, an arm L foractuating said lever, a lever M for imparting motion to said arm L,

'a cam C for actuating said lever M, and

means for engaging and disengaging said arm L and the levers K, K K andM and also for controlling the operation of the first said mechanismwhose function it is to operate said support for the feed necessary inmaking the row of stitches, substantially as specified.

6. In a sewing-machine, the combination of a plate for the fabric to besewed, a support for the said plate carrying it in the direction of thelength of a row of stitches to be made, a crank for imparting to saidsupport the necessary feeding movement in making a row of stitches, thethrow of the crank being made adjustable, a connecting-rod connectingsaid crank with said support with which latter it is adjustably engaged,mechanism for independently imparting to said support a longitudinalreciprocating movement in the direction of the feeding movement, a leverfor disconnecting the connecting-rod from said support, and a cam fortilting the lever, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES T. HOGAN.

Witnesses ANTHONY GREF, S. A. PALMER.

ITS

